I have strange issue with NIC 'Intel Corporation 82574L Gigabit Network Connection' which is propably integrated in a intel atom motherboard (kimsufi atom).

After I boot a kernel, gentoo-sources 3.9.5, NIC does not respond for about 4 hours, ping neither ssh works. I can boot rescue system there, tunnel over ssh the /dev/sda (nbd) and boot it in qemu-kvm here with no issue, so I know it boots just fine, also the uptime is over 4h as soon as I can get in there. Kernel is absolutly minimal (started with make allnoconfig) so there is no weird drivers and such. After boot I can see in dmesg: